Improvement in boot-crimpers



" N.FETERS, PHOTO-LITHOGRAPHER, WASHINGTON. D 4

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i SAMUEL" wl. JAMIsoN, or NEWARK, New JERSEY.

` -Let'vters Pa.tentuNo.i-104,596, dated-June 21, 1870.

i j fIMrRvEMBNT INBooT-CRIMEBRS.

` The` Schdulelreferred to in theseLettars Patent and making part of the same.

To vlioi't'i't-may concern: j 7 t Be it known that LSAMUEIL'W. JAMISON, of Newark, county of Essex and State of New Jersey, have invented certain newiand useful Improvements in'Apparatus for Stretching the Uppers or Fronts of Boots [and Shoesuofwhichthe following is a specification.

`ll/,Iyinvention relates to au apparatus designedwith special reference to its use in connection with a crimpng-maclnne, or machine for crimping the uppers of boots and shoes, such,v for` instance, as described in Y f `Letters Patcnt` recently granted` me, No.499,906`, datedFebruary l5, '1870,

1n crimping the uppers of bootsand shoes, Ilind it necessary, in many cases, to oillor grease the leather after the first operation'of crimping, and while it is still wet, soft, and in such condition that the crimpniay be easily pulled out. In order to oil or `otherw-is'emanipiilate the leather whileinthis condition, without injuring the crimp, I ernploya` forinv'or tree which correspondsin` shapewith the crimping-form, and "with i the form combine a pairof double-acting jaws orlpinycers,`so `arrangedqthat when 'the leather is placed on theform the jaws may be closed upon `the corners` or ffheel of the front, and, at the same time, drawn back, soas to gently, but powerfully, draw down the leather I and stretch it'over the form, thus removing all danger i i ofinjuringV or pulling out thecrimp, which, on the contrary, is made much better and'iirme'r.

".Lhe `apparatus is also lofu reatservicc whenlthe` leather is hardand stubborn, and `diliicult to stretch or bring down to its' proper place,"` withoutagain lputting it through another operation' on the crimpingmachine. In sch cases themachine `maybe used to` stretch to th@ required length "the leather, which, in this condition, can be quioklyand easily greased, and

fore` j 'lhe jaws are made `self-adjusting `to anythickness 'of leather, and are so arrangedthat onecorner of the with -muchvless` labor than `hasbeelr the ease hereto-` leatheron the form may bestretched or pulled down,

whilelthe other is left "fi'eegwhiehis of advantage in case Oneside ofthei'ront, when placed on thef'orm,

" shouldbelonger thanthe"othen` l;

The nature of myinvention, `andthe manner in which- L the same is or may be carried into effect, will-beread-v ily understood `by reference 1 to ithe accompanying drawing, `forming a partofthis specification, lin which-- `Figure 1 is `a perspective View of an appara-tus made m accordance with fmy inventioin` Figure 2`is alongitudi alicentral i Figure 3 is a sectionfonlthelinelxt y, iig. 2. i i v j`A `is `the "treeor` form`,havin`gf that portion over which theleat'her, is stretchedfshaped to correspond 'withithe sha-peof the crim`pingform,ior with the "shape which itis desired to'impart `tof the leather;

section of the same.

That portion of theapparatns by which the leather is clamped and stretched is attached to the heel of the j tree, and isarranged as follows:

'A sliding block, Bis provided, which is support-ed in guide-pieces, or a ame, C, suitablymounted in or upon the tree, and is `held in its lowest position, as shown in figsfl and 3, byaspiral spring, a, or other elastic body, interposed,between the base of the block B and the top of the frame G. This spring is not absolutelynecessary, but `its use is productive'of advantage in insuring the return of the blocks Ito theV position` shown in lthe figures referred to, after its upward or backward movement, as hereinafter explained,;and I therefore prefer to employV it.

The block is corrugated,scored, or ronghened on its two faces l1, and opposite each face is an oscillating or movable jaw, D,-the inner face of which is similarly scored or corrugated, the two'pieces or parts D b on each side forming a pair of jaws, between which the corners'of the leather are clamped and held,vas shown infigl.` j t v The jaws D arepivotedl to ears l formed on the block B, and are attached to or madein one piece with levers or arms E, eachlever and its jaw approximating in shape to a bell-crank lever, the'lpivotal point being at theI angle. The levers `are so formed that they may cross each other and work up and down, without interfering with one another.

To the outer end ot each lever E is pivoted or jointed a levelyF, and the two levers F extend inward or toward each other, and are hung upon a common pivot `seen that, by depressing or pushing forward the ceutral axis or pivot c ofthe levers I l, the effect will be to depress the levers E F and pen the jaws D to the position shown in dotted lines iu'g. 3.

It', now, supposing the corners of the leather to be placed between the jaws, the`axis or center c be raised, thejaws D `will close upon the leather, which will be clamped mostfirmly between the two pairs of jaws.

i The jaws now/will have closed upon the leather as tightly as possible, and if the axis orcenter c be still further lifted or drawn back, the result will be to `retract the levers, oscillating jaws, and sliding block, bodily and` together, thus'stretching the leather and drawing it as tightly as desired over the form.

It will be noticed that, owing to the arrangement of 'the levers4 and the oscillating jaws D, the latter are self-adj listin g to anythickness of leather, and will work 'equally well, whether the corners of `the leather held between the jaws are of equal or unequal thickness; also, if one side of the front is longer-than the-other,

the short corner can be drawn down to the desired length by clasping it inthe jaws, while the other corner is left free.

The levers and jaws, together with the sliding block, which forms a part of the jaws, may bc actuated to perform the above-described movements byany suitable mechanism. The devices which I prefer to employ `for .the purpose are shown in the drawing, and consist of a sliding rack, d, which mores back and forth in a way formed for it in a supplemental or auxiliary frame, O', xed to the tree, and4 is actuated by a pinion or toot-hed segment, j, hung upon an axis or pin, c, supported in the frame O', as shown in figs. 1 and 2.

This rack is connected withthe central pin or axis 'c of the lever system, which passes np through a slot formed in the frame O beneath the rack, and the toothed segment f has a handle, by which it is revol ved.

A spring catch, h, is fixed to the handle, which engages with ratchet-teeth, or a vseries of catches, t', on a raised portion of the frame C', whereby, when the handle-is pressed downward, and so as to move back the rack, and thereby retract the levers and jaws, for the purpose of clamping and stretching the leather, the engagement ofthe springlt with one of the teeth@ opposite, which it may happen to be, will hold all parts securely in position.

By pressing back the spring h, the handle will be released, and the recoil ofthe spring a in the block will suiiice to open the jawsand release the leather. A

It will be not-iced that by one continued movement of the handle, the jaws can be closed .and then drawn back to any extent, so as to stretch the leather more or less, as desired.

In order to allow the apparatus to'be used to the best advantage, I pivot the form or tree Ato the bench G, or other iixed or stationary part, in the manner shown in figs. 1 and 2, or in an equivalent manner, so that the form may he freely turned uponits pivot,

thus giving the workman the same facilities for working on either side.

The form or tree should be made of wood. The jaws and other working partsI prefer to make of iron, or other suitable metal.

The arrangement of levers for actuating the jaws may be considerably- Varied without departing from the principle of my invention, but I prefer that which isv herein shown and described, as I am thereby` ena bled to obtain a gentle, but very powerful movement of the jaws.

Having now described my invention, and the manner in which the same is or may be carried into effeet,

What I claim, and desire to secure by Letters Patent, is-

l. The combination with the boot-form, ofthe corrugated sliding block, the oscillating jaws, pivoted to said block, and the levers, whereby the block and jaws are actuated, when the said block and jaws, and meehanism for operating the same, are mounted upon and make part of the form, substantially as shown and described.

2. The combination with the form andthe corrugated block, mounted and sliding in the form, of the spring, interposed between the said form and block, substantially as and for the purposes set forth.

3. An apparatus for stretching the uppers of boots and shoes, composed of the pivoted or rotary form,the sliding block mounted upon said form, the oscillating jaws, pivoted to said block, and the levers, rack, pinion, and handle, for operating said jaws and block, said parts being arranged forjoiut operation, as shown and set forth.

In testimony whereof I have signed my name to this specification before two subscribing witnesses.

S. W. JAMISON.

Witnesses:

J. D. ENGELBRECHT, THOMAS GORDON. 

